Gemstone Facet Configuration

a silicon carbide gemstone and facet configuration technology, applied in the direction of polycrystalline material growth, crystal growth process, after-treatment details, etc., can solve the problems of diamond facet configurations that are generally diamond facet configurations that are not suitable for sic gemstones,

Inactive Publication Date: 2009-03-05
CHARLES & COLVARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a facet configuration suitable for a diamond may not be suitable for a sapphire due to different material properties of the two stones, such as refractive index.
Existing facet configurations for diamonds and other compounds are generally not suitable for SiC gemstones due to different material properties.
Diamond facet configurations may be unsuitable for use with SiC due to the different refractive indices, or other physical property differences between carbon and SiC.
Not only are traditional facet configurations not suitable for SiC-based gemstones due to different material properties, but traditional configurations also suffer another constraint.

Method used

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Examples

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Embodiment Construction

[0026]Reference will now be made in detail to the present exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Facet Configurations

[0027]FIG. 1A is a side view of a standard round brilliant gemstone 10. In some embodiments, at least a portion of gemstone 10 can have a refractive index of about 2.65, or can be at least partially formed from silicon carbide (SiC). Gemstone 10 can be any suitable dimension, size, or weight. As shown in FIGS. 1A, 1B, and 1C, and explained in detail below, gemstone 10 can have an 8-fold mirror-image symmetry. In other embodiments, gemstone 10 can include a 4, 6, 10 or 12-fold symmetry. In yet other embodiments, gemstone 10 can include other levels or symmetry, or can be asymmetric.

[0028]Gemstone 10 can generally include two portions, a crown 12 and a pavilion 14. Crown 12 can include the ...

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Abstract

A gemstone can include a crown portion having a table facet, a plurality of trapezoidal facets, a plurality of irregular-hexagonal facets, a plurality of irregular-pentagonal facets, and a plurality of triangular crown-facets. The gemstone can also include a pavilion portion having a plurality of first kite facets, a plurality of irregular-quadrilateral facets, a plurality of second kite facets, and a plurality of triangular pavilion-facets.

Description

TECHNICAL FIELD [0001]This invention relates to facet configurations for gemstones, and more particularly, to facet configurations for silicon carbide gemstones.BACKGROUND [0002]Few chemical compounds can be formed into valuable gemstones as only some compounds possess the appropriate physical properties. Gemstones can be made from diamond, formed from single crystalline carbon, and corundum, such as sapphire and ruby, formed from single crystalline aluminum oxide. These materials possess relatively unusual physical properties, including high hardness, high refractive index, and translucent color. A gemstone's value is partially due to these unusual properties and the ability of the gemstone to reflect light.[0003]Material hardness can be defined using the Mohs system, which includes a scale from 1 to 10. Diamond is generally considered the hardest at 10, sapphire at 9, topaz 8 down to the softest mineral, talc, which is 1. Because of its rarity, emerald is considered a precious sto...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A44C17/00A44C17/02C30B23/00C30B33/00
CPCA44C17/001
Inventor ABATE, STEVEN L.
Owner CHARLES & COLVARD
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